An adaptive fuzzy estimator-based satellite fault-tolerant control system

An adaptive fuzzy fault-estimator-based global dynamic sliding mode fault-tolerant control (GDSMFTC) algorithm to solve the fault-tolerant problems of a satellite is proposed in the paper. This estimator can estimate a fault occurred in the system and help the controller to eliminate the effect of the fault. And then a global dynamic sliding mode surface is designed to make sure that the response of the system has global robustness against to the uncertainties of system and external disturbances. The stability of the controller and the fault-estimator is proved by Lyapunov theory and verified by a numerical simulation. The simulation results show that the controller and the fault-estimator have high accuracy and robustness. The control system has well performance when fault occurs.